<...>
However, I don't see why that would break the long term regression model stock-to-flow is based on, which accounts for significant fluctuations from the mean. Temporary deviations from the trend are normal.
This.
S2F models are not meant to be used for trading, and price can, for many reasons that account for the residual 5% of price of bitcoin, deviate largely, but temporary, from predicted price. Trading has a time horizon, be it intraday, daily, or weekly, that is not compatible with the model time-frame, which has months as unit of measure.
This model is meant to be used for investment, and helping discovering the true value proposition of bitcoin.
Of course the co-integration of the model is going to break sooner or later, but until then, the guideline of the model price can be taken as valid.